Author Affiliations

Jin Liu,^1,2,4 Yu-ming He,³ Luca Sapienza,⁵ Kumarasiri Konthasinghe,⁶ Stephan Gerhardt,³ José Vinícius De Miranda Cardoso,¹ Jin Dong Song,⁷ Antonio Badolato,⁸ Christian Schneider,³ Sven Höfling,³ Marcelo Davanço,¹ and Kartik Srinivasan¹

¹Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD, USA 20899

²Maryland Nanocenter, University of Maryland, College Park, MD, USA 20742

³Technische Physik and Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Physikalisches Institut, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany

⁴School of Physics, Sun-Yat Sen University, Guangzhou, 510275, China

⁵Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK

⁶Department of Physics, University of South Florida, Tampa, Florida 33620, USA

⁷Center for Opto-Electronic Convergence Systems, Korea Institute of Science and Technology, Seoul 136-791, South Korea

⁸Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA